Office computers running slow: what to check and who to call in Dallas

What should you do right now, in order?

Work through this list before you call anyone. It takes about a quarter of an hour and it either fixes the problem or tells the technician exactly where to look, which shortens the paid time considerably.

1. Ask everyone: is your computer slow too? Write down who is affected. This is the single most useful piece of information and almost nobody has it ready when they call.
2. Ask what exactly is slow. "Slow" means five different things. Is it the computer starting up, one specific program, opening files from the shared drive, web pages loading, or everything equally? A program that is slow while everything else is fine is a very different problem from a machine that crawls.
3. Test the internet from a phone on Wi-Fi and from a computer. Run a speed test on both. If the internet is slow for everyone, the problem is the connection or the network, not the computers.
4. Restart the slow computers properly. Shut down and start again rather than closing the lid. Windows machines that have been running for weeks accumulate problems that a genuine restart clears.
5. Open Task Manager on a slow machine. Right-click the taskbar, choose Task Manager, click the Performance tab. Look at CPU, Memory and Disk. If any one of them sits at or near one hundred percent while nothing is happening, note which one and what is at the top of the Processes list.
6. Check free disk space. Open File Explorer, click This PC, look at the C: drive. If the bar is red or there is less than about fifteen percent free, that alone will make a computer slow.
7. Check whether updates are running. A big Windows update installing in the background makes a machine feel broken for a while. Let it finish before judging.
8. Note when it started and what changed. New software, a new printer, a power cut, a new internet provider, a change your previous IT person made. Almost every "suddenly slow" office has a change behind it.
9. Call for help with those answers ready. Who is affected, what is slow, what Task Manager showed, how much disk space is free, and when it started.

Do not, at this stage, install a cleaner or optimiser tool that promises to speed things up. Most of them make the machine slower and some of them are outright malware. Do not delete files you do not recognize, and do not uninstall antivirus without knowing what is replacing it.

Is it one computer or all of them?

This is the fork in the road, so treat it as the real first step.

If every computer is slow, stop looking at the computers. Something shared is the cause. In order of how often I find it:

• The internet connection. A circuit that has degraded, a plan that was fine when you had six people and is not fine with sixteen, or a neighbour on shared bandwidth in the same building. Upload speed is the number small offices most often under-buy.
• The Wi-Fi rather than the internet. One consumer router trying to cover a whole suite, too many devices on one access point, or interference from every other network in a shared Dallas office building. Test on a wired connection to separate the two.
• A shared file server or NAS. If opening documents from the shared drive is slow but everything else is fine, the server, its disks or the link to it is the problem.
• A line-of-business application or its database server. Practice management, case management and agency management systems all slow down as their databases grow, especially if nobody has ever maintained them.
• A failing switch or a bad cable. A network port negotiating at the wrong speed, or a cable damaged during a build-out, will quietly throttle everything behind it.
• Something misconfigured. DNS pointing at a dead server, a firewall inspecting traffic it should not, a backup job running during the working day.

If one computer is slow, the causes are on that machine, and they are covered in the next two sections. If a handful are slow, look for what they have in common: same model, same age, same software installed, same part of the building, same person.

Why are our work computers so slow? The usual causes

On a single machine, here is what it actually turns out to be, roughly in order of frequency in the offices I work in.

• A mechanical hard drive. Still the most common cause by a wide margin. An older business desktop or laptop with a spinning disk will feel slow no matter what else you do. Replacing it with a solid state drive transforms the machine, and it is the cheapest meaningful upgrade there is.
• Not enough memory. Eight gigabytes is a working minimum today, and a user with thirty browser tabs, Teams, Outlook and a line-of-business app open will exceed it. When memory runs out, Windows uses the disk instead and everything crawls.
• A drive that is nearly full. Windows needs working space. Below roughly fifteen percent free, performance drops sharply.
• Startup bloat. Years of software that each added something to startup: printer utilities, updaters, cloud sync clients, a scanner tool, three PDF readers.
• Two antivirus products fighting. A machine that came with a trial security suite, plus the one your IT provider installed, plus Windows Defender never properly disabled. Each scans what the others do. This one can halve a computer's speed and is fixed in minutes.
• Cloud sync running wild. OneDrive, Dropbox or Google Drive syncing an enormous folder, or two of them syncing the same folder, will saturate both the disk and the internet.
• Browser extensions. Toolbars and coupon extensions that someone accepted years ago.
• A failing drive. A disk that is developing bad sectors gets slower before it dies. This is the one where slowness is a warning, and it deserves an immediate backup check.
• Overheating and dust. A machine full of dust throttles its processor to protect itself. In a Dallas office where the equipment sits in a warm closet or under a sunny window, this is more common than people think.
• Malware. Less common than it used to be, but a machine mining cryptocurrency or sending spam in the background is very slow, and that is a security incident rather than a performance problem.
• Windows itself needing attention. A failed update stuck in a loop, a corrupted profile that takes several minutes to load, a domain policy applying at every login.

Notice how few of these need a screwdriver. Everything in that list except the drive swap, the memory upgrade and the dust is a remote fix.

What can you check yourself, and what needs a technician?

A clear division of labour, so you do not pay for what you can do in five minutes and do not break something trying to do what you should not.

If a machine is slow and also crashing, freezing or showing blue screens, skip the self-help and get it looked at. That combination points at hardware or drivers, and continuing to use it risks the data on it.

When is a slow computer telling you to replace it?

There is a point where more work on an old machine is throwing money away, and being honest about it is part of the job. My rough guide for business machines in daily use:

• Under three years old: almost always worth fixing. A slow machine this age has a software cause or needs a cheap upgrade.
• Three to five years: depends on the part. A solid state drive or a memory upgrade in a decent business machine buys real years. A failing motherboard or screen does not.
• Over five years: usually replace. Parts availability drops, warranties are long gone, and the labour to keep it alive exceeds the difference in price.
• Any machine that cannot run a currently supported version of Windows: replace it, regardless of how it feels. An unsupported operating system stops receiving security updates, which turns a performance annoyance into a security exposure and a problem with cyber-insurance questionnaires.

The other number to weigh is the one nobody puts in the spreadsheet: what the slowness costs. If four people each lose twenty minutes a day to a slow machine, that is a meaningful amount of paid time every month, quietly, forever. Set against that, replacing a five-year-old computer is not an expense, it is arithmetic.

When it is time to buy, buy business-line machines rather than consumer models from a big-box store: better build, business warranties, standard parts, and drivers that stay available. I work with Dell and Lenovo business lines for exactly those reasons, and buying through an IT provider usually means the machine arrives configured, joined to your systems and ready for the desk. There is more on that in buying and supporting Dell and Lenovo business computers.

How do you stop this happening again?

Slow computers in an office are almost always a maintenance problem rather than a bad-luck problem. The offices that never call me about speed have a few boring things in place:

1. A hardware refresh cycle. Replace a fixed share of machines every year rather than replacing everything in a panic when they all die at once. Budget for it as a recurring line, not an emergency.
2. A standard build. Every new machine set up the same way, with the same software and nothing else, so a slow one is obviously different from the others.
3. One security product, properly deployed. Not three, not a leftover trial.
4. Monitoring on disk space, memory and drive health. This is what a managed plan buys you: I get an alert that a drive is filling or reporting errors before anyone notices the machine is slow.
5. Patching that actually happens. Updates applied on a schedule, outside working hours, rather than surprising someone at nine in the morning.
6. An honest look at the network once a year. Internet plan against headcount, switch age, Wi-Fi coverage, cabling. Offices grow and the network usually does not.

That is what managed IT services covers, quoted per user or per device after a short conversation, month-to-month and cancel anytime. It includes updates, antivirus management, monitoring and unlimited remote support, with onsite visits at no extra charge when remote cannot fix something. For an office that has been limping along on slow machines, the first month is usually the biggest improvement people feel.

Who fixes slow computers for businesses in Dallas?

I do. I am Anthony Omini and I own Cross River Tech, a small managed IT company in Dallas; you deal with me directly, and my team handles the routine monitoring and updates behind me. Slow-computer calls are among the most common things I get, and they are also among the most satisfying, because the difference is immediate and the person at that desk notices it for the rest of the year.

How it works if you call about this:

1. A short conversation to establish whether it is one machine or all of them, and what "slow" means in your case.
2. A remote session onto the affected machine or machines, where I look at the real numbers rather than guessing: drive health, memory pressure, what is consuming the processor, what runs at startup, what security software is installed, what the network looks like from that desk.
3. The quick wins done in the same session, which for most machines is a noticeable improvement immediately.
4. An honest verdict on the rest: this one needs a solid state drive, this one needs memory, this one should be replaced this year, and the shared drive is slow because of the server rather than the computers.
5. Onsite follow-up by appointment for any hardware work, across Dallas and the wider metroplex.

Rates for hourly work with no contract are $100 per hour remote and $150 per hour onsite during business hours, Monday to Friday, 8 AM to 5 PM Central, and $150 remote and $225 onsite after hours, weekends and holidays, with a one-hour minimum. Most slow-computer work is remote, which is both faster and the cheaper of the two, and remote support is available around the clock if you would rather I worked on machines in the evening while nobody needs them. Details are on the hourly IT support and break/fix page, and what can be fixed remotely explains where the line falls.

One last thing worth saying plainly. If computers went from fine to slow across the whole office overnight, and especially if that came with strange emails or unexpected sign-in prompts, do not treat it only as a performance problem. Check for a security incident too. What to do in the first hour after a business email compromise covers those steps, and emergency IT support when a server is down covers the case where a shared system, rather than the desktops, is what has failed.

If your office is grinding along and nobody has looked at it properly, get in touch. Tell me how many machines, roughly how old they are, and whether it is all of them or a few. I will tell you what I would check first and what it is likely to cost.

Questions people ask

Written and reviewed by

Anthony Omini, founder of Cross River Tech

Over 15 years in IT across many industries, now running Cross River Tech, a small owner-led managed IT company in Dallas. Every article is written from his own client work and checked by him before it is published.

Tired of watching a spinner every morning? Tell me how many machines you have, roughly how old they are, and whether it is one desk or the whole office. I will tell you what I would check first and what it is likely to cost.

Ask Anthony(214) 612-7080About Anthony